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Publication numberUS6107912 A
Publication typeGrant
Application numberUS 08/986,864
Publication dateAug 22, 2000
Filing dateDec 8, 1997
Priority dateDec 8, 1997
Fee statusPaid
Publication number08986864, 986864, US 6107912 A, US 6107912A, US-A-6107912, US6107912 A, US6107912A
InventorsScott R. Bullock, John M. Knab, Gordon Smith, David Bartholomew
Original AssigneePhonex Corporation
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Wireless modem jack
US 6107912 A
Abstract
A wireless power line carrier data communication device is provided. The device is specifically adapted to meet the requirements of high-speed modem data transmission, such as is typically required by digital computer networks and similar devices. The device employs an improved power line transmitter power output which reduces the effect of harmonic distortion and also employs a bit-stream sine wave generator with a digital to analog converter to producing a sine wave for the sub-audio carrier signal, which also reduces the effects of harmonic distortion. The device is specifically designed for data transfer over the AC power lines and is compatible with standard AC power signals as well as standard modem equipment and standard telephone connections.
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Claims(3)
We claim:
1. A wireless communication apparatus adapted specifically to communication between a digital modem and a standard telephone line over standard AC power lines, comprising:
(A) a base unit connected to a standard telephone line and to an AC power line for the transmission and receipt of modem data signals;
(B) an extension unit connected to a standard digital computer modem and to an AC power line for transmission and receipt of modem data signals;
(C) a linear, sinusoidal power amplifier transmitter, within said extension unit and in electrical communication with said AC power line, adapted to reduce harmonic distortion of data transmitted over said AC power line; and
(D) a bit-stream sine wave generator, within said extension unit and in electrical communication with said linear, sinusoidal power amplifier transmitter, adapted to produce a sine wave to minimize harmonic distortion.
2. A wireless communications apparatus as recited in claim 1, the base unit further comprising:
(i) a first transmitter transmitting signals to the AC power lines;
(ii) a first receiver receiving signals from the AC power lines; and
(iii) a first controller controlling the receipt and transmission of signals across the AC power lines, wherein said controller communicates electronically with said first transmitter and said first receiver.
3. A wireless communications apparatus as recited in claim 1, the extension unit further comprising:
(i) a second transmitter transmitting signals to the AC power lines;
(ii) a second receiver receiving signals from the AC power lines, and
(iii) a second controller controlling the receipt and transmission of signals across the AC power lines, wherein said second controller communicates electronically with said second transmitter and said second receiver.
Description
BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention relates to electronic communications systems for computers and other electronic equipment. More specifically, this invention relates to the connection between modems and AC power lines for communicating between a computer, or similar device, and a telephone line for data communications.

2. Description of Related Art

A variety of power line carrier telephone voice and/or data communication systems have been developed and are used to facilitate telephonic communications in locations where little or no availability exists for dedicated telephone wires. While these devices provide a voice and/or data connection to the existing power lines they typically do not include features for improving power output and reducing harmonics. This invention provides a significant improvement over prior techniques by use of a design which optimizes the power line data communication channel for data transfer. Prior systems for power line communications, to which the reader is directed for background, includes the following United States and foreign patent documents: 2,510,273, 2,516,211, 2,516,763, 2,535,446, 2,567,908, 2,577,731, 2,654,805, 2,820,097, 2,828,363, 2,932,794, 3,045,066, 3,280,259, 3,334,185, 3,369,078, 3,399,397, 3,400,221, 3,475,561, 3,521,267, 3,529,216, 3,659,280, 3,693,155, 3,810,096, 3,818,481, 3,846,638, 3,852,740, 3,876,984, 3,911,415, 3,922,664, 3,924,223, 3,925,763, 3,925,728, 3,942,168, 3,949,172, 3,967,264, 3,973,087, 3,980,954, 4,012,733, 4,012,734, 4,016,429, 4,057,793, 4,058,678, 4,065,763, 4,107,656, 4,161,027, 4,173,754, 4,174,517, 4,218,655, 4,222,035, 4,239,940, 4,254,403, 4,307,380, 4,321,581, 4,323,882, 4,344,066, 4,357,598, 4,371,867, 4,377,804, 4,386,436, 4,400,688, 4,408,185, 4,408,186, 4,429,299, 4,433,326, 4,442,319, 4,471,399, 4,473,817, 4,475,193, 4,479,033, 4,495,386, 4,514,594, 4,523,307, 4,535,447, 4,538,136, 4,556,864, 4,556,865, 4,556,866, 4,559,520, 4,599,598, 4,609,839, 4,611,274, 4,633,218, 4,638,298, 4,638,299, 4,641,126, 4,641,322, 4,642,607, 4,644,321, 4,675,648, 4,701,945, 4,745,391, 4,745,392, 4,746,897, 4,749,992, 4,759,016, 4,763,103, 4,772,870, 4,774,493, 4,783,780, 4,788,527, 4,809,296, 4,829,570, 4,835,517, 4,845,466, 4,847,903, 4,864,589, 4,866,733, 4,890,089, 4,912,553, 4,962,496, 4,963,853, 4,968,970, 4,988,972, 4,995,053, 5,003,457, 5,032,833, 5,049,876, 5,063,563, 5,065,133, 5,066,939, 5,136,612, 5,151,838, 5,155,466, 5,168,510, 5,187,865, 5,192,231, 5,210,518, 5,241,283, 5,257,006, 5,262,755, 5,278,862, 5,289,476, 5,319,634, 5,327,230, 5,349,644, 5,351,272, 5,355,114, 5,357,541, 5,404,127, 5,406,248, 5,406,249, 5,410,292, 5,412,369, 5,424,709, 5,448,593, 5,452,344, 5,461,629, 5,463,662, 5,467,011, 5,471,190, 5,504,454, 5,554,968, 5,559,377, 5,630,204, GB 2,094,598, AU-B1-12,488/76, Canada 1057436, Canada 1216689, EPO 0 078 171 A2, EPO 0 555 869 A2, PCT/US83/01717, PCT/US90/02291, PCT/US90/06701, PCT/US92/08510, PCT/US93/04726, PCT/US94/03110, and PCT/US95/00354 each of which is hereby incorporated by reference in its entirety for the material disclosed therein.

SUMMARY OF THE INVENTION

It is desirable to provide a means for connecting a computer to a telephone line, for further connection to a network, the internet or the like, via an AC power line. It is particularly desirable to provide a device which provides improved power output, reduced undesirable harmonic effects and is otherwise designed specifically to be optimized for wireless data transfer over AC power lines. Wireless, power line carrier, data communications systems provide many important advantages to computer users. This is particularly the case where standard telephone jacks are limited or unavailable and where AC power outlets are readily available to the computer user. Many of the advantages are discussed in the previously cited patent literature. However, typical prior power line carrier systems which have been designed to meet the requirements of typical voice communication signals are often inadequate when it comes to meeting the more stringent requirements of high speed digital communications between computer systems. It is desirable to provide a wireless power line communication system which provides the improved signal to noise ratio characteristics required for consistent and reliable communication.

Accordingly, it is the primary object of this invention to provide a wireless power line carrier communication system which provides improved transmitter power output.

Another object of this invention is to provide a wireless power line carrier communication system which provides reduced harmonics.

A further object of this invention is to provide a wireless power line carrier communication system which uses frequencies selected to provide optimal separation between the transmitter and the receiver.

It is still another object of this invention to provide a wireless power line carrier communication system which uses a bit-stream sine wave generator to produce a sine wave digitally which has minimal harmonics.

It is a further object of this invention to provide a wireless power line carrier communication system which avoids digital data degradation caused by FM noise reduction circuitry.

A further object of this invention is to provide a wireless power line carrier communication system which provides full-duplex communication.

A still further object of this invention is to provide a wireless power line carrier communication system which is easily adaptable to operate with standard digital modem devices.

Another object of this invention is to provide a wireless power line carrier communication system which is easily connected to standard two-phase AC power lines.

A further object of this invention is to provide a wireless power line carrier communication system which provides improved audio fidelity.

A still further object of this invention is to provide a wireless power line carrier communication system which has enhanced return loss resulting in lower signal reflections.

Another object of this invention is to provide a wireless power line carrier communication system which has improved phone line interface performance.

Another object of this invention is to provide a wireless power line carrier communication system which is adapted to receive caller identification tones.

Another object of this invention is to provide a wireless power line carrier communication system which provides improved combining of caller-ID, standard audio and system data.

Additional objects, advantages, and other novel features of this invention will be set forth in part in the description that follows and in part will become apparent to those skilled in the art upon examination of the following or may be learned with the practice of the invention. The objects and advantages of this invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims. Still other objects of the present invention will become readily apparent to those skilled in the art from the following description wherein there is shown and described the preferred embodiment of this invention, simply by way of illustration of one of the modes best suited to carry out this invention. As it will be realized, this invention is capable of other different embodiments, and its several details, and specific electronic circuits, are capable of modification in various aspects without departing from the invention. Accordingly, the drawings and descriptions should be regarded as illustrative in nature and not as restrictive.

To achieve the foregoing and other objectives, and in accordance with the purposes of the present invention, a power line extension unit and a power line base unit are provided. The extension unit includes a Subscriber Line interface Circuit (SLIC), a microcontroller, a hybrid circuit for providing a mute function and a separating incoming and outgoing signals, a transmit (XMIT) oscillator, a transmitter, a receiver, an audio/data filter, and a improved power supply. The base unit includes a Central Office Line Interface Circuit (COLIC), a hybrid circuit, a trasmit (XMIT) oscillator, a transmitter, a receiver, a low pass filter, control logic and an improved power supply.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings incorporated in and forming a part of the specification, illustrate several aspects of the present invention, and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 is a top level block diagram showing the major sections of the invention.

FIG. 2 is a detailed block diagram of the preferred embodiment of the extension unit of the invention.

FIG. 3 is a detailed block diagram of the preferred embodiment of the base unit of the invention.

Reference will now be made in detail to the present preferred embodiment of the invention, an example of which is illustrated in the accompanying drawings.

DETAILED DESCRIPTION OF THE INVENTION

FIG. 1 shows a top level block diagram of the major sections of the invention. In its preferred embodiment, this invention works with a standard digital computer system 101 which is electrically connected through a standard modem 102 to the extension unit 103 of the invention. The extension unit 103 includes a number of subsections which are shown in additional detail in FIGS. 2 through 10 and described below, however, essential to the improved performance of this invention for digital communications are the bit-stream sine wave generator 104 and the specific power amplifier circuits 106, 113. The bit-stream sine wave generator 104 is used to produce a sine wave digitally with minimal harmonic distortion when compared to the square wave output signal. This bit-stream sine wave generator 104 is used for the sub-audio carrier signal. The sub-audio carrier signal is used to establish the communication link between the base unit 110 and the extension unit 103, by modulating the output voltage controlled oscillator. The modulated output voltage controlled oscillator is detected in the base unit 110, which thereby is informed of the presence of the extension unit 103 on the power line. The sub-audio carrier is commonly referred to as the 1 Hertz signal. The improved power amplifiers 106, 113 provides increased power output with a linear, sinusoidal power output for reduced harmonic distortion, a specific frequency selection for optimal separation between the transmitter and the receiver, thereby minimizing self-induced interference. The power amplifier 106, of the extension unit 103, includes a transceiver for imposing the analog signal from the modem 103 on the AC power lines 108. The transceiver 106 is electrically connected to the AC power lines 108 through a standard AC wall outlet 107. At another AC wall outlet 109 the base unit 110 is connected into the power line signal path. The power amplifier 113, of the base unit 110, includes a second transceiver in the base unit 110 for communicating with the extension unit 103 across the power lines 108. Further details on the internal operation of the base unit 110 is provided below and in FIGS. 11 through 19. An improved power supply 111 circuit is provided in the base unit 110. The base unit 110 communicates with a standard telephone line through an electrical connection to a standard phone outlet 112.

FIG. 2 shows the detailed block diagram of the preferred embodiment of the extension unit 103 of the invention. A microcontroller 203 is provided to control the functions of the extension unit 103. In the preferred embodiment of the microcontroller 203 the bit stream 1 Hertz signal is generated using a 1 bit digital to analog converter (DAC). The current best mode of the bit stream 1 Hertz signal generator uses a Z86E08 digital circuit, the output of which is subsequently filtered using an RC network, the preferred values of which are 10k Ω and 47 μF. A subscriber line interface circuit (SLIC) 201 is provided to receive the modem connection, typically an RJ-11 connector is used, from the modem 102. A hybrid circuit 202 is provided to remove the received signal from the transmitted signal. A transmit oscillator (XMIT OSC) 104 is provided to modulate the carrier signal using the audio signal from the hybrid circuit 202 and generates the sine wave carrier signal for the transmitter 204. In the preferred embodiment of the invention the transmit oscillator 104 is a voltage controlled oscillator (VCO). The transmitter 204 receives the sine wave carrier signal from the XMIT OSC 104 and produces the line carrier signals for transmitting across the power lines 108. A receiver 205 is provided to receive power line signals from the base unit 110. An audio/data filter 206 receives the received signal from the receiver 205, filters the audio signals and extracts the digital control data signals which are intended for internal system control. The power supply circuit 105 is provided to supply power to system components and to provide RF connections to receive and transmit modem and control signals to and from the transmitter 204 interface with the AC power lines 108.

FIG. 3 shows the detailed block diagram of the preferred embodiment of the base unit 110 of the invention. Control logic is provided 307 to control the functions of the base unit 110. The sub-audio signal is detected in the control logic section 307. In the current preferred embodiment of the invention a Z86E80 digital circuit is used in this detection function. Also provided attached to the preferred embodiment of the invention is an indicator light 309 to provide visual indication of the operation of the base unit 110. A carrier line interface circuit (COLIC) 301 is provided to send and receive the digital modem signals, typically through an RJ-11 310 connector, from the standard wall telephone outlet 112. Within the COLIC 301 a caller-ID circuit is provided in the preferred embodiment of the invention. A hybrid circuit 302 is provided to remove the receive signal from the transmitted signal at the two-wire interface. A transmit oscillator (XMIT OSC) 303 is provided to receive the transmitted signal from the hybrid circuit 302 and to generate the carrier signal for the transmitter 304. In the preferred embodiment of the XMIT OSC a voltage controlled oscillator (VCO) is provided and used. The transmitter 304 receives the carrier signal from the XMIT OSC 303 and produces a sine wave carrier signal for transmitting across the power lines 108 to the extension unit 103. A receiver 305 is provided which receives power line signals from the extension unit 103. The lowpass filter 306 receives the received signal from the receiver 305, filters this signal and splits off digital system data from any audio signal. The power supply circuit 111 is provided to power the other base components and to provide the connections for the received and transmitted carrier signals to and from the transmitter 304 interfacing with the AC power lines 108, via a standard two or three prong AC plug 308. Typically the AC power lines 108 provide 110 VAC, however, alternative power systems are compatible with the concept of this invention.

The foregoing description is of a preferred embodiment of the invention and has been presented for the purposes of illustration and description of the best mode of the invention currently known to the inventors. It is not intended to be exhaustive or to limit the invention to the precise form, connections, or choice of components disclosed. Obvious modifications or variations are possible and foreseeable in light of the above teachings. This embodiment of the invention was chosen and described to provide the best illustration of the principles of the invention and its practical application to thereby enable one of ordinary skill in the art to utilize the invention in various embodiments and with various modifications as are suited to the particular use contemplated. All such modifications and variations are within the scope of the invention as determined by the appended claims when they are interpreted in accordance with the breadth to which they are fairly, legally and equitably entitled.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2510273 *Oct 11, 1946Jun 6, 1950Bell Telephone Labor IncPower line carrier frequency telephone system
US2516211 *May 8, 1946Jul 25, 1950Bell Telephone Labor IncFilter connecting telephone transmitter to power line during calls
US2516763 *Aug 22, 1946Jul 25, 1950Bell Telephone Labor IncPower line carrier frequency telephone system
US2535446 *Jun 16, 1948Dec 26, 1950Bell Telephone Labor IncCarrier communication system
US2567908 *Jul 31, 1947Sep 11, 1951Monmouth Lab IncRadio carrier alarm system
US2577731 *Aug 27, 1947Dec 11, 1951Int Standard Electric CorpHigh-frequency traffic system over power supply lines
US2654805 *Oct 28, 1949Oct 6, 1953Westinghouse Electric CorpRemote-control system
US2820097 *Aug 29, 1952Jan 14, 1958Westinghouse Air Brake CoApparatus for carrier intercommunication systems
US2828363 *Sep 25, 1952Mar 25, 1958Westinghouse Electric CorpCarrier current communication system
US2932794 *Jul 29, 1954Apr 12, 1960Motorola IncSubcarrier separation system
US3045066 *Mar 14, 1957Jul 17, 1962Beuscher Donald ASelective carrier type communication system
US3280259 *Sep 27, 1962Oct 18, 1966Cotter John RTelephone repeater and portable telephone communication systems utilizing power line carrier currents
US3334185 *Aug 15, 1963Aug 1, 1967Electricite De FranceSignal transmission systems by carrier currents on a power line
US3369078 *Jun 28, 1965Feb 13, 1968Charles R. StradleySystem for transmitting stereophonic signals over electric power lines
US3399397 *Jan 7, 1966Aug 27, 1968Elliot JosephsonApparatus for sending and receiving a signal on an a-c line
US3400221 *Jun 14, 1963Sep 3, 1968Gen ElectricMusic distribution system using fm transmission over house wiring
US3475561 *Sep 29, 1965Oct 28, 1969Superior Continental CorpTelephone carrier system having selfcontained independently attachable line tap units
US3521267 *Dec 27, 1966Jul 21, 1970Mastercraft Electronics CorpDual modulated single carrier frequency remote control
US3529216 *Jun 29, 1967Sep 15, 1970Sonus CorpRemote control system utilizing a.c. transmission lines
US3659280 *Nov 20, 1967Apr 25, 1972Dantronics IncCommunication system using the electrical power distribution network of a building
US3693155 *Mar 23, 1971Sep 19, 1972Nat Telecommunications SystemCommunication system
US3810096 *Sep 14, 1972May 7, 1974Integrated Syst CoMethod and system for transmitting data and indicating room status
US3818481 *Aug 14, 1972Jun 18, 1974Codata CorpMultiple address direct coupled communication and control current carrier system
US3846638 *Sep 6, 1973Nov 5, 1974Gen ElectricImproved coupling arrangement for power line carrier systems
US3852740 *Apr 16, 1973Dec 3, 1974Borzage KAlarm system with radio alarm link and equipment-activating power line link
US3876984 *Apr 19, 1974Apr 8, 1975Concord Computing CorpApparatus for utilizing an a.c. power line to couple a remote terminal to a central computer in a communication system
US3911415 *Oct 31, 1974Oct 7, 1975Westinghouse Electric CorpDistribution network power line carrier communication system
US3922664 *May 28, 1974Nov 25, 1975Carl D WadsworthDigital communication system which can be utilized as a security system for apartment houses or the like
US3924223 *Feb 21, 1974Dec 2, 1975Westinghouse Electric CorpPower line communication system having a protective terminating impedance arrangement
US3925728 *Feb 21, 1974Dec 9, 1975Westinghouse Electric CorpInduction watthour meter for power systems transmitting carrier communication signals
US3925763 *Sep 13, 1973Dec 9, 1975Krishnahadi Sikun PribadiSecurity system
US3942168 *Jan 31, 1975Mar 2, 1976Westinghouse Electric CorporationDistribution network power line communication system
US3949172 *Feb 8, 1974Apr 6, 1976Brown William MTelephone extension system utilizing power line carrier signals
US3967264 *Jan 31, 1975Jun 29, 1976Westinghouse Electric CorporationDistribution network power line communication system including addressable interrogation and response repeater
US3973087 *Dec 5, 1974Aug 3, 1976General Electric CompanySignal repeater for power line access data system
US3980954 *Sep 25, 1975Sep 14, 1976Westinghouse Electric CorporationBidirectional communication system for electrical power networks
US4012733 *Oct 16, 1975Mar 15, 1977Westinghouse Electric CorporationDistribution power line communication system including a messenger wire communications link
US4012734 *Feb 9, 1976Mar 15, 1977American Science & Engineering, Inc.Synchronous power communicating
US4016429 *Jan 16, 1976Apr 5, 1977Westinghouse Electric CorporationPower line carrier communication system for signaling customer locations through ground wire conductors
US4057793 *Oct 28, 1975Nov 8, 1977Johnson Raymond ECurrent carrier communication system
US4058678 *Apr 7, 1976Nov 15, 1977Astech, Inc.Remote signalling to a telephone line utilizing power line carrier signals
US4065763 *Dec 8, 1975Dec 27, 1977Westinghouse Electric CorporationDistribution network power line communication system
US4107656 *May 23, 1977Aug 15, 1978General Electric CompanyData communication receiver and transfer apparatus
US4161027 *Oct 4, 1976Jul 10, 1979Electric Power Research Institute, Inc.Digital protection system for transmission lines and associated power equipment
US4173754 *Jun 24, 1977Nov 6, 1979General Electric CompanyDistributed control system
US4174517 *Jul 15, 1977Nov 13, 1979Jerome MandelCentral system for controlling remote devices over power lines
US4218655 *Dec 14, 1977Aug 19, 1980New England Power Service CompanyMethod and apparatus for transmitting intelligence over a carrier wave
US4222035 *May 25, 1978Sep 9, 1980Lohoff Warren GMultiplex system having digital coded power line signals
US4239940 *Dec 26, 1978Dec 16, 1980Bertrand DorfmanCarrier current communications system
US4254403 *Aug 6, 1979Mar 3, 1981The General Electric Company LimitedSystems for transmitting information in an alternating current electricity supply system
US4307380 *Dec 22, 1977Dec 22, 1981Lgz Landis & Gyr Zug AgTransmitting signals over alternating current power networks
US4321581 *Mar 5, 1979Mar 23, 1982Siemens AktiengesellschaftPowerline carrier control system
US4323882 *Jun 2, 1980Apr 6, 1982General Electric CompanyMethod of, and apparatus for, inserting carrier frequency signal information onto distribution transformer primary winding
US4344066 *Oct 27, 1980Aug 10, 1982Robertshaw Controls CompanyNoise trap arrangement for AC power line communication systems
US4357598 *Apr 9, 1981Nov 2, 1982Westinghouse Electric Corp.Three-phase power distribution network communication system
US4371867 *Oct 1, 1980Feb 1, 1983Lgz Landis & Gyr Zug AgTransmitting signals over alternating current power networks
US4377804 *Oct 24, 1980Mar 22, 1983Matsushita Electric Works, Ltd.Synchronous data transmission system utilizing AC power line
US4386436 *Feb 27, 1981May 31, 1983Rca CorporationTelevision remote control system for selectively controlling external apparatus through the AC power line
US4400688 *Oct 15, 1980Aug 23, 1983New England Power Service CompanyMethod and apparatus for communication over electric power lines
US4408185 *Nov 13, 1979Oct 4, 1983Elsmark A/SProcess for transferring information and system for carrying out the process
US4408186 *Feb 4, 1981Oct 4, 1983General Electric Co.Power line communication over ground and neutral conductors of plural residential branch circuits
US4429299 *Jan 26, 1981Jan 31, 1984Robertshaw Controls CompanyTwo-way AC power line communications system
US4433326 *Feb 4, 1981Feb 21, 1984General Electric CompanyPower line communication system using the neutral and ground conductors of a residential branch circuit
US4442319 *Feb 26, 1981Apr 10, 1984Treidl Bernhard LTelephone accessible appliance control system
US4471399 *Mar 11, 1982Sep 11, 1984Westinghouse Electric Corp.Power-line baseband communication system
US4473817 *Apr 13, 1982Sep 25, 1984Rockwell International CorporationCoupling power line communications signals around distribution transformers
US4475193 *Sep 30, 1982Oct 2, 1984Astech, Inc.Power line carrier multi telephone extension system for full duplex conferencing between telephones
US4479033 *Mar 29, 1982Oct 23, 1984Astech, Inc.Telephone extension system utilizing power line carrier signals
US4495386 *Nov 7, 1983Jan 22, 1985Astech, Inc.Telephone extension system utilizing power line carrier signals
US4514594 *Sep 30, 1982Apr 30, 1985Astech, Inc.Power line carrier telephone extension system for full duplex conferencing between telephones and having telephone call hold capability
US4523307 *Nov 30, 1982Jun 11, 1985Astech, Inc.Power line carrier multi telephone extension system for full duplex conferencing and intercom between telephones
US4535447 *Jan 31, 1983Aug 13, 1985Hazeltine CorporationRemote monitoring system transmitter
US4538136 *Mar 30, 1981Aug 27, 1985Amtel Systems CorporationPower line communication system utilizing a local oscillator
US4556864 *Aug 26, 1982Dec 3, 1985Roy Joseph JApparatus and method for communicating digital information on AC power lines
US4556865 *Aug 9, 1982Dec 3, 1985Matsushita Electric Works, Ltd.Data transmission system utilizing power line
US4556866 *Mar 16, 1983Dec 3, 1985Honeywell Inc.Power line carrier FSK data system
US4559520 *Jun 23, 1982Dec 17, 1985New England Power Service CompanyMethod for communication utilizing multi-mode reception
US4599598 *May 20, 1985Jul 8, 1986Matsushita Electric Works, Ltd.Data transmission system utilizing power line
US4609839 *Oct 1, 1984Sep 2, 1986General Electric CompanyNoise inverter circuit for a power line communication system
US4611274 *Jul 29, 1983Sep 9, 1986Sharp Kabushiki KaishaData transmission system via power supply line
US4633218 *Dec 19, 1983Dec 30, 1986Honeywell Inc.Apparatus for receiving low level digital signals transmitted over power lines
US4638298 *Jul 16, 1985Jan 20, 1987Telautograph CorporationCommunication system having message repeating terminals
US4638299 *Mar 28, 1983Jan 20, 1987Pico Electronics LimitedElectrical appliance control
US4641126 *Dec 7, 1984Feb 3, 1987Ferranti-Subsea Systems, Ltd.Multiple-mode electrical power and communications interface
US4641322 *Oct 18, 1984Feb 3, 1987Nec CorporationSystem for carrying out spread spectrum communication through an electric power line
US4642607 *Aug 6, 1985Feb 10, 1987National Semiconductor CorporationPower line carrier communications system transformer bridge
US4644321 *Oct 22, 1984Feb 17, 1987Westinghouse Electric Corp.Wireless power line communication apparatus
US4675648 *Apr 17, 1984Jun 23, 1987Honeywell Inc.Passive signal coupler between power distribution systems for the transmission of data signals over the power lines
US4701945 *Oct 9, 1984Oct 20, 1987Pedigo Michael KCarrier current transceiver
US4745391 *Feb 26, 1987May 17, 1988General Electric CompanyMethod of, and apparatus for, information communication via a power line conductor
US4745392 *Oct 27, 1982May 17, 1988Sharp Kabushiki KaishaNoise reduction in signal transmission system over building power distribution wiring
US4746897 *Apr 2, 1987May 24, 1988Westinghouse Electric Corp.Apparatus for transmitting and receiving a power line
US4749992 *Jul 3, 1986Jun 7, 1988Total Energy Management Consultants Corp. (Temco)Utility monitoring and control system
US4759016 *May 4, 1987Jul 19, 1988Nec CorporationTDMA communication system having common local path medium and local time slot for intraoffice calls
US4763103 *Feb 13, 1986Aug 9, 1988EnertecProcess and method for wide band transmission, particularly for data transmission over an electricity distribution network
US4772870 *Nov 20, 1986Sep 20, 1988Reyes Ronald RPower line communication system
US4774493 *May 15, 1986Sep 27, 1988Hewlett-Packard CompanyMethod and apparatus for transferring information into electronic systems
US4783780 *Jun 23, 1986Nov 8, 1988U.S. Philips Corp.Method and apparatus for selecting a free channel in a mobile radio system
US4788527 *Sep 17, 1984Nov 29, 1988Johansson Fritz HApparatus and method for device control using a two conductor power line
US4809296 *Feb 11, 1987Feb 28, 1989Bbc Brown, Boveri Ltd.Method for transmitting data via the lines of a power supply system
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US6904134 *Jun 15, 2001Jun 7, 2005Lg Electronics Inc.Network infrastructure integrated system
US7091687 *Jun 2, 2003Aug 15, 2006Mhouse SrlElectrical system for controlling at least one gate or door or similar element of the type moved electrically
US7164346Apr 30, 2002Jan 16, 2007Koninklijke Philips Electronics N.V.Routing device and method for a powerline network
US7291998Jul 14, 2006Nov 6, 2007Nice S.P.A.Electrical control safety system comprising photocells or equivalent sensors
US8035507Oct 28, 2008Oct 11, 2011Cooper Technologies CompanyMethod and apparatus for stimulating power line carrier injection with reactive oscillation
WO2001028215A1 *Oct 13, 2000Apr 19, 2001Phonex Broadband CorpDigital multi-line telephone jack
WO2009088681A1 *Dec 17, 2008Jul 16, 2009Phonex CorpRf/power line diversity system
Classifications
U.S. Classification375/220, 340/310.18, 375/259, 340/310.13, 340/310.11, 455/402, 340/12.39, 340/12.32, 340/12.34
International ClassificationH04H1/00, H04B1/00
Cooperative ClassificationH04B2203/5416, H04B3/546
European ClassificationH04B3/54C
Legal Events
DateCodeEventDescription
Mar 4, 2013ASAssignment
Owner name: PHONEX CORPORATION, UTAH
Free format text: ASSIGNMENT TO CORRECT THE CORRECTIVE ASSIGNMENT RECORDED AT REEL/FRAME 028549/0833. ASSIGNOR(S) HEREBY CONFIRM THE NAME OF THE ASSIGNEE IS PHONEX CORPORATION;ASSIGNORS:BULLOCK, SCOTT R.;KNAB, JOHN M.;SMITH, GORDON;AND OTHERS;SIGNING DATES FROM 19971204 TO 19971205;REEL/FRAME:029919/0417
Owner name: PHONEX BROADBAND CORPORATION, UTAH
Free format text: CHANGE OF NAME;ASSIGNOR:PHONEX CORPORATION;REEL/FRAME:029919/0461
Effective date: 19991117
Jul 16, 2012ASAssignment
Owner name: PHONEX BROADBAND CORPORATION, A DELAWARE CORPORATI
Effective date: 20041007
Free format text: MERGER;ASSIGNOR:PHONEX BROADBAND CORPORATION, A UTAH CORPORATION;REEL/FRAME:028559/0594
Jul 12, 2012ASAssignment
Owner name: PHONEX BROADBAND CORPORATION, UTAH
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Apr 24, 2012ASAssignment
Effective date: 20120208
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Feb 9, 2012ASAssignment
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Jan 27, 2012ASAssignment
Owner name: PHONEX BROADBAND CORPORATION, UTAH
Effective date: 20120120
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Jan 11, 2012ASAssignment
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Dec 22, 2011FPAYFee payment
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Jan 21, 2011ASAssignment
Owner name: PHONEX BROADBAND CORPORATION, UTAH
Effective date: 20110112
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Mar 3, 2010ASAssignment
Owner name: D.P. KELLY & ASSOCIATES, L.P.,ILLINOIS
Effective date: 20091222
Free format text: SECURITY AGREEMENT;ASSIGNOR:PHONEX BROADBAND CORPORATION;REEL/FRAME:24023/84
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Jun 9, 2005ASAssignment
Owner name: PHONEX BROADBAND CORPORATION, UTAH
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May 19, 2003ASAssignment
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Free format text: SECURITY AGREEMENT;ASSIGNOR:PHONEX BROADBAND CORP.;REEL/FRAME:014066/0489
Effective date: 20030414
Owner name: SILICON VALLEY BANK 3003 TASMAN DR. LOAN DOCUMENTA
Free format text: SECURITY AGREEMENT;ASSIGNOR:PHONEX BROADBAND CORP. /AR;REEL/FRAME:014066/0489
Dec 8, 1997ASAssignment
Owner name: PHONEX CORPORATION, UTAH
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BULLOCK, SCOTT R.;KNAB, JOHN M.;SMITH, GORDON;AND OTHERS;REEL/FRAME:008913/0972;SIGNING DATES FROM 19971204 TO 19971205